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.TH "KNIFE-XARGS" "1" "Chef 12.0" "" "knife xargs"
.SH NAME
knife-xargs \- The man page for the knife xargs subcommand.
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The \fBknife xargs\fP subcommand is used to take patterns from standard input, download as JSON, run a command against the downloaded JSON, and then upload any changes.
.sp
\fBSyntax\fP
.sp
This subcommand has the following syntax:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
$ knife xargs [PATTERN...] (options)
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
\fBOptions\fP
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This subcommand has the following options:
.INDENT 0.0
.TP
.B \fB\-0\fP
Use to show a \fBNULL\fP character (\fB\e0\fP) instead of white space as the separator. Default: \fBfalse\fP\&.
.TP
.B \fB\-\-chef\-repo\-path PATH\fP
The path to the chef\-repo\&. This setting will override the default path to the chef\-repo\&. Default: same as specified by \fBchef_repo_path\fP in config.rb.
.TP
.B \fB\-\-concurrency\fP
The number of allowed concurrent connections. Default: \fB10\fP\&.
.TP
.B \fB\-\-[no\-]diff\fP
Use to show a diff when a file changes. Default: \fB\-\-diff\fP\&.
.TP
.B \fB\-\-dry\-run\fP
Use to prevent changes from being uploaded to the Chef server\&. Default: \fBfalse\fP\&.
.TP
.B \fB\-\-[no\-]force\fP
Use to force the upload of files even if they haven\(aqt been changed. Default: \fB\-\-no\-force\fP\&.
.TP
.B \fB\-I REPLACE_STRING\fP, \fB\-\-replace REPLACE_STRING\fP
Use to define a string that will be used to replace all occurrences of a file name. Default: \fBnil\fP\&.
.TP
.B \fB\-J REPLACE_STRING\fP, \fB\-\-replace\-first REPLACE_STRING\fP
Use to define a string that will be used to replace the first occurrence of a file name. Default: \fBnil\fP\&.
.TP
.B \fB\-\-local\fP
Use to build or execute a command line against a local file. Set to \fBfalse\fP to build or execute against a remote file. Default: \fBfalse\fP\&.
.TP
.B \fB\-n MAX_ARGS\fP, \fB\-\-max\-args MAX_ARGS\fP
The maximum number of arguments per command line. Default: \fBnil\fP\&.
.TP
.B \fB\-p [PATTERN...]\fP, \fB\-\-pattern [PATTERN...]\fP
One (or more) patterns for a command line. If this option is not specified, a list of patterns may be expected on standard input. Default: \fBnil\fP\&.
.TP
.B \fB\-\-repo\-mode MODE\fP
The layout of the local chef\-repo\&. Possible values: \fBstatic\fP, \fBeverything\fP, or \fBhosted_everything\fP\&. Use \fBstatic\fP for just roles, environments, cookbooks, and data bags. By default, \fBeverything\fP and \fBhosted_everything\fP are dynamically selected depending on the server type. Default value: \fBdefault\fP\&.
.TP
.B \fB\-s LENGTH\fP, \fB\-\-max\-chars LENGTH\fP
The maximum size (in characters) for a command line. Default: \fBnil\fP\&.
.TP
.B \fB\-t\fP
Use to run the print command on the command line. Default: \fBnil\fP\&.
.TP
.B \fB\-c CONFIG_FILE\fP, \fB\-\-config CONFIG_FILE\fP
The configuration file to use.
.TP
.B \fB\-\-chef\-zero\-port PORT\fP
The port on which chef\-zero will listen.
.TP
.B \fB\-d\fP, \fB\-\-disable\-editing\fP
Use to prevent the $EDITOR from being opened and to accept data as\-is.
.TP
.B \fB\-\-defaults\fP
Use to have knife use the default value instead of asking a user to provide one.
.TP
.B \fB\-e EDITOR\fP, \fB\-\-editor EDITOR\fP
The $EDITOR that is used for all interactive commands.
.TP
.B \fB\-E ENVIRONMENT\fP, \fB\-\-environment ENVIRONMENT\fP
The name of the environment. When this option is added to a command, the command will run only against the named environment.
.TP
.B \fB\-F FORMAT\fP, \fB\-\-format FORMAT\fP
The output format: \fBsummary\fP (default), \fBtext\fP, \fBjson\fP, \fByaml\fP, and \fBpp\fP\&.
.TP
.B \fB\-h\fP, \fB\-\-help\fP
Shows help for the command.
.TP
.B \fB\-k KEY\fP, \fB\-\-key KEY\fP
The private key that knife will use to sign requests made by the API client to the Chef server\&.
.TP
.B \fB\-\-[no\-]color\fP
Use to view colored output.
.TP
.B \fB\-\-print\-after\fP
Use to show data after a destructive operation.
.TP
.B \fB\-\-server\-url URL\fP
The URL for the Chef server\&.
.TP
.B \fB\-u USER\fP, \fB\-\-user USER\fP
The user name used by knife to sign requests made by the API client to the Chef server\&. Authentication will fail if the user name does not match the private key.
.TP
.B \fB\-v\fP, \fB\-\-version\fP
The version of the chef\-client\&.
.TP
.B \fB\-V\fP, \fB\-\-verbose\fP
Set for more verbose outputs. Use \fB\-VV\fP for maximum verbosity.
.TP
.B \fB\-y\fP, \fB\-\-yes\fP
Use to respond to all confirmation prompts with "Yes". knife will not ask for confirmation.
.TP
.B \fB\-z\fP, \fB\-\-local\-mode\fP
Use to run the chef\-client in local mode. This allows all commands that work against the Chef server to also work against the local chef\-repo\&.
.UNINDENT
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\fBExamples\fP
.sp
The following examples show various ways of listing all nodes on the server, and then using Perl to replace \fBgrantmc\fP with \fBgmc\fP:
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.INDENT 3.5
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.nf
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$ knife list \(aqnodes/*\(aq | knife xargs "perl \-i \-pe \(aqs/grantmc/gmc\(aq"
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.fi
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or without quotes and the backslash escaped:
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.INDENT 3.5
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.nf
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$ knife list /nodes/\e* | knife xargs "perl \-i \-pe \(aqs/grantmc/gmc\(aq"
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.fi
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or by using the \fB\-\-pattern\fP option:
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.INDENT 3.5
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.nf
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$ knife xargs \-\-pattern \(aq/nodes.*\(aq "perl \-i \-pe \(aqs/grantmc/gmc\(aq"
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.fi
.UNINDENT
.UNINDENT
.SH AUTHOR
Chef
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